I love the abstract and colorful look. It actually is really nice without being based on code! Some more code samples for people to click through could be fun to play around with too. Have you printed one for yourself yet? A photo of you wearing a shirt would be wonderful. dojo4 [1] (Boulder, CO) built and subsequently took down a similar product called Speakteesy [2] last year. It's really hard to get the pricing re…
re: shirts.io, yeah I'm using their successor, scalablepress.com. The API is much better now.